/usr/include/sofa/filemanager/sofapml/ is in libsofa1-dev 1.0~beta4-11+b3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/sofa/filemanager/sofapml/LMLConstraint.h
/usr/include/sofa/filemanager/sofapml/LMLConstraint.inl
/usr/include/sofa/filemanager/sofapml/LMLForce.h
/usr/include/sofa/filemanager/sofapml/LMLForce.inl
/usr/include/sofa/filemanager/sofapml/LMLReader.h
/usr/include/sofa/filemanager/sofapml/PMLBody.h
/usr/include/sofa/filemanager/sofapml/PMLFemForceField.h
/usr/include/sofa/filemanager/sofapml/PMLInteractionForceField.h
/usr/include/sofa/filemanager/sofapml/PMLMappedBody.h
/usr/include/sofa/filemanager/sofapml/PMLReader.h
/usr/include/sofa/filemanager/sofapml/PMLRigidBody.h
/usr/include/sofa/filemanager/sofapml/PMLStiffSpringForceField.h
/usr/include/sofa/filemanager/sofapml/argumentParser.h
/usr/include/sofa/filemanager/sofapml/sofapml.h